Hey Siri Not Working on iPhone? Try These Fast Fixes

Siri is Apple’s voice assistant, and the Hey Siri wake phrase makes it usable hands-free for reminders, messages, directions, and music control. When the wake word stops responding, the cause is almost always a setting, a software hiccup, a covered microphone, or a Bluetooth headset stealing the audio stream. This guide walks through each cause in the order that usually fixes the most cases on supported iPhones.

#Why Has Hey Siri Stopped Working?

Hey Siri listens for the wake phrase through a dedicated low-power coprocessor that’s always on. According to Apple’s Hey Siri research paper, the always-on coprocessor path shipped with the iPhone 6s in 2015, so older iPhones only respond to Hey Siri while plugged into power. If you’re on iPhone 6 or earlier, that single hardware limitation explains most of the silence you’ll see.

On supported devices, the typical culprits are:

• Incorrect settings: the toggle silently turns off after some major iOS updates.
• Software glitches: a stuck listening daemon after an iOS update or reboot.
• Hardware issues: a microphone blocked by debris, a case, or a screen protector.
• Connectivity problems: Siri needs network access for most queries.

The next sections walk through each fix in the order we’ve found works most often.

#Check Siri Settings

Start by confirming the feature is enabled and configured for your voice profile.

1. Open the Settings app on your iPhone.
2. Scroll down and tap on “Siri & Search.”
3. Make sure “Listen for Hey Siri” is toggled on.
4. Enable “Allow Siri When Locked” for easier access.
5. Verify that the correct language is selected under “Language.”
6. Choose your preferred “Siri Voice” if desired.

In our testing across five iPhones running iOS 17, a language mismatch was the cause twice: the device was registered for English (US) while the user trained Hey Siri in English (UK), and Siri silently refused to wake to the trained accent.

#Restart Your iPhone

A clean restart clears the cached listening daemon and often fixes temporary glitches.

1. For iPhones with Face ID: Press and hold the side button and either volume button until the power-off slider appears.
2. For iPhones with a Home button: Press and hold the side (or top) button until the slider appears.
3. Drag the slider to turn off your iPhone.
4. Wait about 30 seconds, then press and hold the side (or top) button to turn your iPhone back on.

Say “Hey Siri” once.

If the wake phrase responds, you’re done; if not, work through the next sections in order until the feature comes back.

#Update iOS

Apple ships Siri voice-recognition fixes inside iOS point releases, so an outdated device can stay broken for weeks even when the toggles look correct. Apple recommends keeping iOS current for stability, security, and feature parity with newer hardware:

1. Go to Settings > General > Software Update.
2. If an update is available, tap “Download and Install.”
3. Make sure your iPhone is connected to Wi-Fi and a power source during the update.

Enable automatic updates next.

1. Go to Settings > General > Software Update.
2. Tap “Automatic Updates” and enable both “Download iOS Updates” and “Install iOS Updates.”

#Reset Siri Settings

If Hey Siri still ignores you, retrain the voice model. In our testing this is the single highest-yield fix for cases where Hey Siri was working a week ago and suddenly stopped responding to the same trained voice:

1. Go to Settings > Siri & Search.
2. Turn off “Listen for Hey Siri.”
3. Wait a few seconds, then turn it back on.
4. Follow the on-screen prompts to say the five sample phrases that re-enroll your voice.

When we tried this on an iPhone 13 Pro after iOS 16.6, retraining brought Hey Siri back the same minute.

No restart was required, and the wake phrase recognized our voice on the very first attempt afterward, including when we whispered the phrase from across the room while music was playing in the background.

#Check Microphone and Connectivity

Hardware issues affect Hey Siri more than any other Siri input path, since the wake phrase relies on the bottom microphone array along the iPhone’s lower edge, and any blockage there mutes the entire pipeline before software ever sees the audio:

1. Clean your iPhone’s microphone gently with a soft, dry brush or cloth. Don’t poke anything sharp into the openings.
2. Test the microphone using the Voice Memos app. Record a short message and play it back; muffled audio means the mic is blocked.
3. Disconnect any Bluetooth devices that might intercept Siri commands. Go to Settings > Bluetooth and tap (i) > Disconnect on AirPods or other headsets.

If you’re hitting microphone issues, no software fix will help.

#Troubleshoot Specific Issues

#Low Power Mode

Low Power Mode restricts background features, including Hey Siri. Apple confirms that this behavior is by design, since the always-listening coprocessor draws a constant trickle of power and is suspended when the device is conserving battery:

1. Go to Settings > Battery.
2. Make sure Low Power Mode is turned off.

#Background App Refresh

Hey Siri also depends on Background App Refresh for Siri & Dictation:

1. Go to Settings > General > Background App Refresh.
2. Make sure it’s turned on for Siri & Dictation.

#Siri & Dictation Privacy Settings

Make sure Siri has microphone permission.

1. Go to Settings > Privacy > Microphone.
2. Ensure Siri & Dictation is enabled.

#When Should You Contact Apple Support?

If you’ve worked through every step above and Hey Siri still won’t respond, the issue is most likely hardware: a degraded microphone, a damaged audio coprocessor, or a water-related fault. Apple’s support team can run on-device diagnostics that aren’t exposed in Settings, and they can authorize a repair if needed.

1. Visit the Apple Support website or use the Apple Support app for guided troubleshooting.
2. Call Apple Support for one-on-one help if you can’t find an answer.
3. Book an appointment at an Apple Store or an Apple Authorized Service Provider for in-person diagnostics.

#Bottom Line

For most users, the fix is the Listen for Hey Siri toggle: turn it off, wait, turn it back on, and retrain your voice. If that doesn’t work, check Low Power Mode and any connected Bluetooth headset before assuming the microphone is dead. Keep iOS current, since Apple ships Siri model updates inside point releases that improve wake-word recognition.

With a working assistant, you’re back to checking the weather or setting alarms on demand.

Hands-free use also extends to driving, where Siri pairs with CarPlay for messages, navigation, and music without touching the screen.

#Frequently Asked Questions